What is the full-load speed of shunt-dc motor

Assignment Help Electrical Engineering
Reference no: EM13270158

A 20-hp, 250 V shunt-DC motor has an armature circuit of 0.22 ohms and a field resistance of 170 ohms . At a low-load, the speed is 1200 rpm and the armature current is 3 A. At full-load, the current is 55 A, and the flux is reduced by 6% (due to armature reaction) from its value at lowload. What's the full-load speed?

Reference no: EM13270158

Questions Cloud

What is the centripetal acceleration of the child : A 46.0-kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 20.0 m. What is the centripetal acceleration of the child
What is the voltage at the input of the first amplifier : Two amplifiers are cascaded, one with a voltage gain of 6.02 db and the other with a voltage gain of 12. If 10 mV is measured at the input of the second amplifier, what is the voltage at the input of the first amplifier
What is the horizontal force acting on the puck : An air puck of mass m1 = 0.15 kg is tied to a string and allowed to revolve in a circle of radius R = 1.1 m on a frictionless horizontal table. What is the horizontal force acting on the puck
Find the internal voltage generated by the generator : A three-phase synchronous generator (Delta-connected) rated at 10KVA, 230 V, has a synchronous reactance of 1.2ohms per phase and an armature resistance of 0.5ohms per phase. (a) Draw the phasor diagram.
What is the full-load speed of shunt-dc motor : A 20-hp, 250 V shunt-DC motor has an armature circuit of 0.22 ohms and a field resistance of 170 ohms . At a low-load, the speed is 1200 rpm and the armature current is 3 A. At full-load, the current is 55 A, and the flux is reduced by 6%
What is the absolute potential at the squares center : the absolute portential at the exact center of a square is 3.0v when a charge of +Q is located at one of the squares corners. What is the absolute potential at the squares center
Would a bank earn more revenue : Would a bank earn more revenue on a $10 million loan by charging 8% compounded quarterly or 7.9% compounded daily, other things being equal? Show all working in your answer.
What is the business-level strategy of wal-mart : What is the business-level strategy of Wal-Mart and differentiation or cost leadership? According to the case, what does Wal-Mart do in order to implement its business-level strategy?
Compute the internal energy of gas : The internal energy of a gas is 1000j. The gas is compressed adiabatically and it's volume deceases by 400cm^3. What is internal energy of gas

Reviews

Write a Review

Electrical Engineering Questions & Answers

  Find what is the highest possible output voltage magnitude

ts diode acts as a constant 1.0 V drop. the input voltage is 12.0 V. tje ;pad os a 4 ohm resistor. what is the highest possible output voltage magnitude, and at what value duty ratio does it occur

  What should the surface concentration of the boron implant

A Si sample is uniformly doped with phosphorus at 5 E 16 cm^-3. We make a p-n junction by implanting boron atoms into the surface layer. The implanted depth is 0.15 µm. What should the surface concentration of the boron implant

  Explain eigenfunctions and lti systems

Eigenfunctions and LTI systems, The eigenfunction property is only valid for LTI systems. Consider the cases of nonlinear and of time varying systems.

  Find the values of voc and jsc when connected in parallel

A p-n junction solar cell has Voc = .5 V and Jsc = 20 mA/cm2. A second cell of same area has Voc = .6V and Jsc = 16 mA/cm2. Assuming both cells obey ideal diode equation find the values of Voc and Jsc when connected in parallel and series

  Derive minimal boolean expressions for flip-flop inputs

Design a 2-bit counter that, when f = 1, counts in the repeating sequence: 0, 2, 3, and when f = 0, counts in the reverse direction. Use T flip-flops. (a) Construct a state diagram or state table. (b) Specify a state assignment.

  Design logic program that will track activity for turnstile

design a logic program that will track the activity for one turnstile. there will be three inputs PHASEA, B and RESET. there will be no output. the program should be able to track 999 total guests.

  Find the magnitude and the phase response of the filter

A linear-phase FIR filter should be designed with the ideal magnitude response shown in Figure 1 which represents an narrow band-pass filter. The lower cutoff frequency, fL , is 2,000 Hz, and higher cutoff frequency, fH , is 3,600 Hz.

  Draw a circuit for function using only and-or and not gate

F = B'D' + A'B'C + ABC + CD' Draw a circuit for this function using only AND , OR, and NOT gates. The function calls for two 3-input AND gates and one 4-input OR gate. All you have available, however, are 2-input AND and OR gates

  Find the necessary strip widths and spacing

An edge-coupled microstrip line with a ground plane spacing of 0.5 mm and dielectric constant of 10 is required to have even- and odd-mode characteristic impedances of Zoe=70  and Zoo=40

  What are leading manufacturers of tools for growing method

What crystal growth method is used for today's high brightness LEDs and what are the leading manufacturers of the tools for this growth method.

  What is the maximum power that can be delivered to the load

The battery is made by connecting 5 unit cells in series and then by connecting 7 of these series cells in parallel. Each unit cell has the voltage of 1.25 V and the internal resistance if 3.4 Ohm.

  Describe work of electrical source in the voltage generator

1.write down the electrical status equation for the circuit with serial connection of RLC- elements in vector form and darw diagram for this circuit. 2. Describe the work of electrical source in the voltage generator regime. and what is the working..

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd